人类最终从动物界分化出来的根本标志是A．抽象思维 B．手足分工 C．直立行走 D．制

深圳市是个严重缺水的城市，为了保护环境，充分利用水资源，经过深圳市“调整水费听证会”讨论后决定，从2004年8月1日起居民用水水费由过去1.6元/立方米调整为1.9元/立方米，并提出“超额高费措施”即：每户每月定额用水不超过22立方米，超过22立方米但不超过30立方米的部分每立方米加收50%的水费；超过30立方米的部分每立方米加收100%的水费。

（1）某户居民响应节水号召，计划月平均用水量比过去少4立方米，这使480立方米的水可以比过去多用4个月。则这户居民计划月平均用水量是（    ）立方米；

（2）如果该户居民在一年中实际有4个月的月平均用水量超过计划月平均用水量的40%，其余8个月按计划用水，那么按照新交费法，则该户居民一年需要交水费（    ）元。

气化炉压力表通高压氮气的作用是什么（）。

A.吹扫压力表测压点，防止粉尘盖住，减小误差，保证测量的准确性

B.对冷却压力表进行冷却保护

C.对压力表进行氮气密封

D.充高压氮气的目的是为了保护压力表在高温、高压下不被炉内的还原性气体（H₂、CO）腐蚀

急性前壁心肌梗死最常见的心律失常是（）。

A.室性早搏及室性心动过速

B.房室传导阻滞

C.房性早搏

D.室上性心动过速

E.心房颤动

Cooperation is the common endeavor of two or more people to perform a task or reach a jointly cherished goal. Like competition and conflict, there are different forms of cooperation, based on group organization and attitudes.
In the first form, known as primary cooperation, group and individual unite. The group contains nearly all of each individual’s life. The rewards of the group’s work are shared with each member. There is an interlocking identity of individual, group, and task performed. Means and goals become one, for cooperation itself is valued.
While primary cooperation is most often characteristic of preliterate societies, secondary cooperation is characteristic of many modern societies. In secondary cooperation, individuals devote only part of their lives to the group. Cooperation itself is not a value. Most members of the group feel loyalty, but the welfare of the group is not the first consideration. Members perform tasks so that they can separately enjoy the fruits of their cooperation in the form of salary, prestige, or power. Business offices and professional athletic teams are examples of secondary cooperation.
In the third type, called tertiary cooperation or accommodation, latent conflict underlies the shared work. The attitudes of the cooperating parties are purely opportunistic; the organization is loose and fragile. Accommodation involves common means to achieve antagonistic goals; it breaks down when the common means cease to aid each party in reaching its goals. This is not, strictly speaking, cooperation at all, and hence the somewhat contradictory term antagonistic cooperation is sometimes used for this relationship.

Which of the following is an example of the third form of cooperation as it is defined in Paragraph 4

A. Students form a study group so that all of them can improve their grades.
B. A new business attempts to take customers away from an established company.
C. Two rival political parties temporarily work together to defeat a third party.
D. Members of a fanning community share work and the food that they grow.

Bohler角